Inliners International Forums General Discussion Bench racing looking for an inline guru in eastern pa

You're not going to fix it until you know what the cam is, both to set the lash and estimate the power range.
Where is the spark set now?
600 is a Holley 4150, yes? What list number? Has primary PV?
"get it to run right", meaning what? Doesn't start? Doesn't idle? Fouls plugs? Overheats?
Compression test shows what?
Leak-down test?